Pruning out diseased parts, when done without any other treatment, gave 
79 percent control in plot III and 14 percent in plot IV, but failed by 5 percent in 
plot VIII. 
A greater number of cases of wilt occurred in the blocks of sprayed trees» 
than in the checks. Bordeaux in plot III permitted the occurrence of 15 percent 
more, and in plot VII 12 percent more diseased trees than occurred in the corres- 
ponding checks. With Koloform in plot IV, the number of diseased trees was 28 per- 
cent greater, and in plot IX-L 26 percent greater than occurred in the check blocks. 
And in the flotation sulphur block in plot VII the proportion of diseased trees was 
greater by 15 percent than in the check. In contrast, however, sulphur dust proved 
somewhat effective, Kolodust permitting the occurrence in plot VIII of 28 percent 
fewer cases of wilt than occurred in the check. 
Results obtained when pruning was combined with fungicides proved erratic. 
In plot III, combined with Bordeaux, trees becoming infected were 12 percent fewer 
than in the check and about 24 percent fewer than with Bordeaux alone. But combined 
with Koloform in plot VII, pruning appears to have increased very considerably the 
proportion of diseased trees, in comparison with both the check and the sprayed 
blocks. Done in combination with dusting---Kolodust in plot VIII---it appears to 
have been moderately effective, the number of diseased trees being but 50 percent of 
the number occurring in the check block, 70 percent of the number in the dusted 
block, and 49 percent fewer than when pruning alone was done. 
These five years of consecutive treatment indicate, on the basis of the 
Bebults just stated, that so far as "wilt" control is concerned the use of Bordeaux 
and sulphur sprays for summer application alone tends to increase the prevalence of 
“elm wilt." The practice of pruning out diseased parts generally tends to reduce 
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